38781776355157 has 4 divisors (see below), whose sum is σ = 42307392387456. Its totient is φ = 35256160322860.

The previous prime is 38781776355151. The next prime is 38781776355191. The reversal of 38781776355157 is 75155367718783.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38781776355157 - 2³ = 38781776355149 is a prime.

It is a super-2 number, since 2×38781776355157² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38781776355157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38781776355151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1762808016133 + ... + 1762808016154.

It is an arithmetic number, because the mean of its divisors is an integer number (10576848096864).

Almost surely, 2^{38781776355157} is an apocalyptic number.

It is an amenable number.

38781776355157 is a deficient number, since it is larger than the sum of its proper divisors (3525616032299).

38781776355157 is a wasteful number, since it uses less digits than its factorization.

38781776355157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3525616032298.

The product of its digits is 1037232000, while the sum is 73.

The spelling of 38781776355157 in words is "thirty-eight trillion, seven hundred eighty-one billion, seven hundred seventy-six million, three hundred fifty-five thousand, one hundred fifty-seven".